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At least 379 records · Page 21Linked to original sources
PubMed2005

The role and application of in silico docking in chemical genomics research.

In silico docking techniques are being used to investigate the complementarity at the molecular level of a ligand and a protein target. As such, docking studies can be used to identify the structural features that are important for binding and for in silico screening efforts in which suitable binding partners can be identified. Here we describe a practical approach for setting up docking simulations using different docking programs. We also cover the analysis and rescoring of the obtained docking poses. Possible pitfalls in the docking studies are discussed and hints are provided to resolve commonly occurring problems.

Binding Sites↗
PubMed1975

Design methods for tubular fermentation systems.

Methods for the design of tubular fermentation systems are summarized. The first part, on tubular system hydrodynamics, is concerned with the design methods for gas hold-up, pressure drop, drop-size distribution and actual interfacial area, and with non-ideal flow conditions. This being a critical review, only the more important methods have been selected. More recent design methods for the prediction of oxygen transfer coefficients in fermentation systems and methods of determining of true kinetic relations are also reviewed, accounting for the inevitable non-ideality of flow. General rules for system optimization are presented.

Bacteria↗
PubMed1991

An effectiveness factor you can see. Experimental visualization of the effectiveness factor concept in a biological system.

Effectiveness factor values corresponding to carrageenan immobilized yeast beads packed in a continuous tubular fermenter are obtained from the mathematical modelization of the reactor performing ethanol fermentation. Simultaneously, microscopical direct observation of transversal sections corresponding to two different points in the fermenter is in good agreement with the calculated values: An effectiveness factor near to unity gives a uniform cell distribution in beads, as an effectiveness factor near to 0.75 corresponds to a non-uniform cell growth in beads. This observation gives a visual evidence of the validity of the approach used to treat diffusional limitations in biocatalytic particles.

Biotechnology↗
PubMed1990

Plastics from bacteria and for bacteria: poly(beta-hydroxyalkanoates) as natural, biocompatible, and biodegradable polyesters.

Hence, PHB belongs to the family of poly(beta-hydroxyalkanoates), PHA, all of which are usually formed as intracellular inclusions under unbalanced growth conditions. Recently, it became of industrial interest to evaluate PHA polyesters as natural, biodegradable, and biocompatible plastics for a wide range of possible applications such as surgical sutures or packaging containers. For industrial applications, the controlled incorporation of repeating units with different chain lengths into a series of copolymers is desirable in order to produce polyesters with a range of material properties because physical and chemical characteristics depend strongly on the polymer composition. Such "tailormade" copolymers can be produced under controlled growth conditions, in that if a defined mixture of substrates for a certain type of microorganisms is supplied, a well defined and reproducible copolymer is formed.

Bacteria↗
PubMed1996

Chromatography in the downstream processing of biotechnological products.

Chromatography techniques are essential for the isolation and purification of most of the high value products of modern biotechnology. The economically sensible and technically satisfactory downstream processing of a therapeutic protein, usually involves a number of chromatographic steps. Its development and optimization require considerable knowledge of the various physico-chemical and engineering aspects of biochemical chromatography. This review addresses the various modes of chromatography and the design of chromatographic separation processes from a biotechnologist's point of view. Strategies for optimizing the structure of the downstream process are outlined and scaling up consideration are discussed. The importance of the different chromatographic methods in research and development is estimated in an analysis of protein purification schemes recently published in the literature. Finally, examples of the application of chromatographic procedures for process scale product purification in the biotechnological industry are given.

Biotechnology↗
PubMed2004

Integrated microsystems for controlled drug delivery.

Efficient drug delivery and administration are needed to realize the full potential of molecular therapeutics. Integrated microsystems that incorporate extremely fast sensory and actuation capabilities can fulfill this need for efficient drug delivery tools. Photolithographic technologies borrowed from the semiconductor industry enable mass production of such microsystems. Rapid prototyping allows for the quick development of customized devices that would accommodate for diverse therapeutic requirements. This paper reviews the capabilities of existing microfabrication and their applications in controlled drug delivery microsystems. The next generation of drug delivery systems--fully integrated and self-regulating--would not only improve drug administration, but also revolutionize the health-care industry.

Chemical Engineering↗
PubMed2006

Synthetic glycobiology: Exploits in the Golgi compartment.

The challenge of engineering glycosylation has been confronted by synthetic chemists, biochemists and cell biologists, each with the primary goal of optimizing glycoconjugates for therapeutic applications. In nature, glycans are constructed by glycosyltransferases that are organized in an assembly line in the endoplasmic reticulum and Golgi compartment. Recent insights into the domain architecture, localization and regulation of glycosyltransferases have provided a platform for engineering their position within the secretory pathway and access to substrates. Using this knowledge, glycosyltransferase assembly lines have been redesigned for the production of specific glycan structures using protein engineering and chemical approaches. These efforts epitomize the emerging field of 'synthetic glycobiology'.

Glycoproteins↗